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Prev Professional Automotive Repair Technical Discussions for February 17, 2007
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Open Help Requests for GM
Help Request Answers
1997 Cadillac Seville SLS 4.6L cooling system VIN: 1G6KS52Y4V
car came in with customer complaint of overheating when running the car hard (80mph). pulled water pump to check impeller. it was ok, but I damaged it removing it, so it has a new one. put in a new thermostat while putting in the water pump. after repairs, i d...
1992 GMC Jimmy SLE 4.3L low power VIN: 1GKDT13W9N
first time, hope i get this right. 92 s10 jimmy has no power low vacuum. car towed to us, customer had replaced distributor. found distributor in wrong, reset distributor and timing. runs poorly. we have tested fuel pressure and flow. smoke test intake. repair...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet Astro 4.3L heat VIN: 1GNEL19W8X
both heater hoses were restricted.replaced hoses and heater core again. flush system multiple times to get all contaminates out.heater hoses were restricted at clamp that holds them to the heater box.we checked flow from intake to heater valve,to heater core t...
2000 Chevrolet Monte Carlo SS 3.8L MIL Lamp on, Coolant Fans On VIN: 2G1WX12KOY
Thanks to all of you who responded so quickly to my request. Sorry I took so long to close. Problem was intermittant and wanted to be sure car was fixed. A thermostat as most suggested fixed this one. Thanks Trouble codes: P0128 (testing and results).
2000 Chevrolet Corvette 5.7L transmission VIN: 1G1YY32G9Y
First of all I used my own personal snap on MODIS everything on car was in working order the PCM has been performance tuned and I found out that the torque converter slip RPM signal was removed from program by tuner
2003 Chevrolet Impala LS 3.8L starting VIN: 2G1WH52K43
we found that if we removed the 60amp ign fuse from the under hood fuse panel and waited the draw would go away in about 2-3 minutes, we removed and replace the ignition switch and removed an after market remote starter system that was disconnected before this...
1989 GMC K1500 Sierra SLE 5.7L master cylinder VIN: 1GTDK14K4K
i had a lot of help on this one...thanx to all. i blocked the ports from the RABS valve and the proportioning valve to the front and rear brakes and had a fantstic hi and hard pedal so i knew my problem was after all the valves. which was a great suggestion fr...
1999 GMC Yukon Denali SLE 5.7L Starting VIN: 1GKEK13R4X
This vehicle was beyond my scanning capabilities, so I referred it to a next door shop with what I hoped would be better equipment capabilities, but, in the end, after they confirmed that the ignition system was at fault (passlock system most referred to in re...
1999 Pontiac Grand Am GT 3.4L Heater Core VIN: 1G2NW12EXX
Well,This is the first time I have used IATN. WOW, thanks for all the fast respones. I finally got time to work on this vehicle. It was air in the system. The bleeder valve was leaking and drawing air into the system. I felt both heater hoses at idle,one was h...
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